/*    turtle.c    basic movement commands:    forward, backward, right, left, and stop*/    int	LEFT_MOTOR=     0;int	RIGHT_MOTOR=    3;void forward(){    fd(LEFT_MOTOR);    fd(RIGHT_MOTOR);}void backward(){    bk(LEFT_MOTOR);    bk(RIGHT_MOTOR);}void right(){    fd(LEFT_MOTOR);    bk(RIGHT_MOTOR);}void left(){    fd(RIGHT_MOTOR);    bk(LEFT_MOTOR);}void stop(){    off(LEFT_MOTOR);    off(RIGHT_MOTOR);}